K&N Air Filter Su-9915 High flow cotton filter media is designed to increase airflow by as much as 50, resulting in an increase of horsepower and torque. K&N Air Filters are tested to ensure increased airflow when compared to OEM paper filters. Engineered to last throughout the life of your motorcycle and backed by K&N Million Mile Limited warranty. Features: The original High-Flow Air Filter invented by K&N Designed for all street legal motorcycles Made to OEM size specs and to fit in original air box These filters feature a design that provide unique high flow characteristics Delivers improved performance and excellent protection for the life of the bike Provides low restriction for increased airflow Includes a large filtration area that delivers high capacity and long service intervals, provided by pleated media Years of protection without corrosion provided by durable Zinc coated top plates Specifically designed to fit OE air filter assembly Pre-oiled and ready for immediate use